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Updated: Jun 5, 2026
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High-resolution, High-speed, Three-dimensional Video Imaging with Digital Fringe Projection Techniques
Published on: December 3, 2013
Estimation of dynamically varying displacement derivatives using fringe projection technique
G Rajshekhar1, Sai Siva Gorthi, Pramod Rastogi
1Applied Computing and Mechanics Laboratory, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland.
Applied Optics
|January 26, 2011
Summary
This study introduces a novel fringe projection technique using pseudo Wigner-Ville distribution to analyze dynamic object deformation. The method accurately measures temporal displacement derivatives for continuously deforming objects.
Area of Science:
- Optical Metrology
- Non-Destructive Testing
- Mechanical Engineering
Background:
- Analyzing dynamic deformation is crucial for understanding material behavior under stress.
- Traditional methods for measuring displacement derivatives can be complex and time-consuming.
Purpose of the Study:
- To develop an efficient method for analyzing the temporal behavior of displacement derivatives in continuously deformed objects.
- To leverage fringe projection and pseudo Wigner-Ville distribution for enhanced deformation analysis.
Main Methods:
- Projecting a computer-generated fringe pattern onto a dynamically deforming object.
- Recording reflected intensity as a video sequence using a CCD camera.
- Applying pseudo Wigner-Ville distribution for instantaneous phase derivative estimation.
Main Results:
- The method successfully estimates the instantaneous phase derivative from recorded fringe patterns.
- Simulation and experimental results validate the proposed technique's potential for dynamic deformation analysis.
Conclusions:
- The pseudo Wigner-Ville distribution-based fringe projection method offers a viable approach for analyzing temporal displacement derivatives.
- This technique shows promise for real-time monitoring of continuously deforming objects.
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